peeters



June 28, 1927. 1,634,042

H. PEETERS TYPEWRITER Filed Feb. 20. 1924 2 Sheets-Sheet 1 PIE. 1

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H. PEETERS June 28, 1927.

TYPEWRITER Filed Feb. 0, 1924 2 Sheets-5heet 2 HENRY PEETERS, OF.WARCGING, BELGIUlvI.

TYPEWRITER.

Application filed February 20, 1924, Serial No. 694,078, and in Belgium December 21, 1923.

This invention rel-at to escapement mechanism for typewriters in which the tension ot the carriage propelling means effects the disengagement or a control member from the escapement wheel as soon as an abutment, displaced by a key, trees the said member.

Analogous devices are known in which the control member comprises an oscillating lever having one end forked, and is alternately moved in one direction and then in the other following the rotation of the escapement whee-l. This lever is held for holding the carriage, by an abutment pivoting about an axle, the angular displacements of which are produced by depressing a key on the spacer bar. This abutment has two active faces, serving respectively for holding the lever when the latter is moved in one or the other direction by the escapement wheel. The defect in this arrangement is that the pivoting oi the abutment spreads the two active surfaces of the end of the lever.

Since the lever can oscillate but once, it is necessary to provide an intermediate abutment which stops the lever temporarily until the lirst abutn'ient returns to its place.

As a result, there is a double shock of the lever against the surfaces which limit its n'iovement, which produces vibration and noise and prevents attaining a speed beyond a triltaiil limit.

Further, this construction is objectionable when it is desired to move the carriage continuously in the direction of writing by pcrman tly disengaging the abutment, since in such case, the lever oscillates during movement oi tl e carriage.

The present invention cures these detects in providing a t pewriter in which the escapen'ient mechanism is notonly silent, but also permits attaining the greatest speed without resulting irregular movements oi the carriage.

3i first object or the invention is to provide an abutment tor the control element oi: the es )(ll'lcllt wheel which is completely disengaged fron'i said element during displacement of the latter.

A second object of the invention is to provide mechanism controlling the displacement oi the. abutment under the control of a member accessible to the hand so that the carriage can move in the direction of writing, over a distance of one or several spaces. This member acts on the mechanism in the term of a cam wheel the rotation of which causes one or several alternate successive pivot movements of the abutment, and accordingly, one or several successive oscillations of the control member.

A third object of the invent-ion is to pro vide mechanism controlled by hand, which disengages the control element from the es capement wheel so as to immobilize said ele ment while the carriage is in motion.

Other advantages and improvements will appear in the course of the description of a particularly advantageous form of the invention, and which is given. solely by way of example.

In the said drawings, the elements mentioned in the concurrent applications relating to the general arrangement or' the typewriter, to the mechanism which controls the movements of the paper carriage and to the return key, are marked with the same ref erence figures.

Figure 1 shows the device with the ele ments in a characteristic position.

Figure 2 shows the same elements in another characteristic position.

Figure 3 shows the position of some of the elements of the device when the carriage is released and at the n'ioinent where it is about to move.

The carriage moves relatively to the bed 62 01" the machine under the action of a mechanism notshown, which acts through a pinion on the rack 103 of the carriage 60.

The escapement mechanism acts on the latter through the pinion 133 engaging with the rack 134;, as is usually done in type Writers.

Nevertheless, in known typewriters, the escapement is arranged between the driving mechanism and the carriage, whilst in the machine according to the invention. the escapement is completely independent of the mechanism which produces the automatic movement of the carriage in the direction of writing.

As will be seen, from the description given, below, the escapement mechanism acts on the pinion 133 as a brake. whilst the carriage is constantly exposed to the action of the spring which ensures its driving.

This results in the advantage that the carriage is perfectly locked at the moment when the type strikes.

To that end, the spindle 150 of the pinion 133 carries a toothed wheel 151 which, un

SO I

der the action of the spring which acts on the carriage, has always the tendency to rotate in the direction permitting writing, and turns loosely on the said spindle during the movementof the carriage in the turn direction. The said wheel is locked at the moment of striking by one of the stop lingers 152 or 1.53 which engages at that nioment between two teeth of the wheel.

The fingers 152 and 153 are provided on a frame which swings about pivot pins 152!- and 155 and is situated in the same plane as the toothed wheel 151.

This frame comprises two supports 156 mounted each on two parallel conjugated arms 157 and 156. The arms 158 are connected together by a cross-bar 159 provided near its centre with a. finger 160.

The shape of the teeth of the wheel 1.51. is such that the said wheel produces automaticall-y, by its rotation, the oscillation of the frame 156, 157, 158 and owing to the said oscillation the linger 152 moves between the two teeth which are opposite it at the moment when the linger 153 becomes disengaged from the corresponding teeth.

The oscillation of the frame would there-- fore be a continuous one if the said move ment were not stopped at the moment of typing a letter by the pivoted stop 161 which comes in front of the finger 160 in order to lock the frame, and consequently the whee1 151, and disappears at the mo- 1n)ent when the carriage has to move (Fig. 3

The control of the stop is obtained by the depression of a key, or by the spacing mechanism, through a mechanism which will be described in the following.

The stop 161 is carried by a support 162. and it pivots about the pin, 163. It is constantly pulled upwardly by a compression spring 16 1 which tends to keep the end 165 of the said stop in contact with the cam wheel 166 intermittently rotated by the action of a finger 167 which is loi'igitudinally moved in a given direction.

The rotation of the wheel 166 produces the pivoting or turning of the stop 161 which thus releases the finger 160 in order to allow the carriage tomove. According as the finger 152 or 153 is engaged between the teeth of the wheel 151, the stop presses on the left (Fig. 1) or on the right (Fig. 2) against the finger 160.

The rotation of the cam wheel 166 is produced by the longitudinal movement of. the rod 168 which carries at one end the finger 167, whilst its other end 169 tern'iinates in an inclined plane. The said rod 168 is supported by the bar 170 by means of the pivot pin 171 and turns relatively to the bar. The bar 170 is supported at one end by the pivoted arms 172 keyed to the spindles 173 on which act, by means of pawls 171 the nesgo ia rods 109 secured to the elements 110 and 111 on which act through an arrangement of levers the various keys of the keyboard, and also to the handle 108 which controls the escaping.

The shape and the arrangement of the pawls 17 1 are such that the elements 11()--111 and the handle 1.06, arr-(urged at either side of the keyboard, act on the bar 170 so as always to move it in the same direction.

This movement of the bar 170 drives the rod 168, owing to which the cam wheel 166 is rotated. During the movement, the inclined plane comes in contact with the fixed eccentric cam 175 mounted on a spindle 176, the turning of which is controlled by hand, by means of a handle not shown and projecting in front of the typewriter.

The contact of the inclined plane 169 with the saidcani 175 produces the turning of the rod 168 relatively to the bar 170, which disengages the linger from the cam wheel 166. The said wheel has consequently turned to a certain angle, and the cam is oi? such a shape that, after the stopping of the wheel... the stop 161 is in engagement with one or the other face of the finger 160.

The position of the eccentric cam 175 determines the angle to which the cam wheel 166 turns, since the disengagement of the linger 167 from the wheel 166 takes place the more quickly during the longitudinal movementof the bar 170, the greater the distance of the generatrix of the cam 175. which is in contact with the inclined plane 169, from the spindle 176.

In that way, thecam 175 is brought into such a position that the disengagen'ient of the finger 167 takes place only after the wheel 166 has turned to an angle correspond ing to one, two or more teeth, so that the frame 156-157-158 therefore makes one, two or more oscillations before the carriage is locked.

As one oscillation of the frame produces the advance of the carriage to a length corresponding to that of a character, the movement, after two or three consecutive oscillsn tions, will be two or three times greater.

Owing tothe variable position of the cam 175, the length of the movements of the carriage after the depression of one of the keys may be regulated.

This is more particularly important when it is desired to copy documents written in one of the oriental languages in which characters of great length alternates with others of average or of small length.

After having worked, the bar 170 returns to its original position under the action of the spring 177. and the rod 168 under the action of the spring 178.

In addition, a means has been provided tor simultaneously disengaging the two tin-- g-ers 152 and 153 from the toothed wheel liZU 151 when it is desired to move the carriage freely in the direction or" writing.

To that end, a bar 129 lowered by hand by means of a suitable system o't levers, lowers an arm 131 pivoted about the pin 132. The said arm 131 carries a rod 180, the bent ends or which 181 are arranged closeto the levers 182 pivoted about 188, the ends 185 of which levers are bent in wards As regards the ends 181 they are connected to the fingers 152 and 153.

By lowering the arm 131, the ends. 181 of the rod 180 are brought in contact with the levers 182 and disengage simultaneously the two fingers 152 and 158 from the wheel 151.

The various elements are then returned to their original position by the springs 186 and 187 acting respectively on the arm 131 and on the fingers 152 and 158.

l Vhat I claim as my invention and desire to secure by Letters Patent is:

1. An escapement mechanism for type-- vriters, comprising a power driven carriage, a toothed escapement wheel constantly urged to rotate in one direction by the carriage, control means acting on the escapement wheel, release means normally restraining said control means and actuated by a key or the spacer bar to release the control means, the control means holding the escapement wheel stationary until released. by the release means, the control and release means automatically reinnnobilizing the escapement wheel after the latter has turned through an angle corresponding to the desired movement or? the carriage, said release means including, a toothed cam wheel, means causing angular movei'i'ien't of the cam wheel upon del t. ion of a key or the spacer bar, and an oscillatable lever having one end constant:- ly in contact with the cam wheel.

2. An escapement mechanism for type writers, comprising a power driven carriage, a toothed escapement wheel constantly urged to rotate in one direction by the carriage, control means acting on the escapement wheel, release means normally restraining said control means and actuated by a key or the spacer bar to release the control means, the control means holding the escapement wheel stationary until released by the re-- lease means, the control and release means automatically reimmobilizing the escapement wheel after the latter has turned through an angle corresponr'ling to the desired movementot the carriage, sa'id release means including, a toothed cam wheel, means causing angular movement of the cam wheel upon depression ot' a key or the spacer bar, and an oscillatable lever having one end constantly in contact with the cam wheel, and hand operated regulating means for varying the amount of angular movement of the cam wheel.

3. An escapement IIIBCl'HlIllSHl for typewriters, comprising, a toothed escapement wheel subjected to a constant tortion movement by the power driven carriage, an oscillatable frame having pivoted arms, two detents carried by the frame and positionet on either side of the escapement wheel to co operate therewith, a transverse member connected to the pivoted arms, rotation of the escapement wheel oscillating the frame and causing the successive engagement of one detent and disengagement ot the other detent from the escapement wheel, a finger on the transverse men'iber, a release'men'iber normally engaging with the linger, and means causing disengagement of the finger by the release member, upon depression of a key or the spacer bar, to thus permit oscillation of the frame.

1-.11n escapement mechanism for typewriters, comprising, a toothed escapement wheel subjected to a constant tortion movement by the power driven carriage, an oscillatable frame having pivoted arms, two detents carried by the frame and positioned on either side of the escapement wheel to cooperate therewith, a transverse member connected to the pivoted arms, rotation of the escapement wheel oscillating the frame and causing the successive engagement of one detent and disengagement of the other deten't from the escapement wheel, a linger on the transverse member, a release member normally engaging with the finger, the release member comprising, a pivoted lever one end of which is positioned to contact with the finger, a toothed cam wheel, means urging the other end of the lever into contact with the cam wheel so that rotary movement oi the cam wheel. causes alternate pivoting movement oi the lever, and means actuated by depression of a key or the spacer bar for causing rotary movement of the cam wheel.

5. An esczupement mechanisu'i for typewriters, con'iprising, a toothed escapement wheel subjected to a constant tortion movement by the power driven carriage, an oscillata'ble frame having pivoted arms, two detents carried by the frame and positioned on either side of the escapement wheel to cooperate therewith, a transverse member con nected to the pivoted arms, rotation oi the escapen'ient wheel oscillating the frame and causing the successive engagement 01" one detent and disengagement oi the other (letent from the escapement wheel, a linger on he transverse member, a release member nor ma ly engaging with the finger, the release nien'iber comprising, a pivoted lever one end of which is positioned to contact with the linger, a toothed cam wheel. means urging the other end of the lever into contact with the cam wheel so that rotary movement of the cam wheel causes alternate pivoting movement of the lever, and means actuated by depression of a key or the spacer bar for ill) causing rotary movement of the cam wheel and a hand operated regulating member for predetermining the extent of movement of the cam wheel upon depression of a key or the spacer bar.

(3. An escapcment mechanism for typewriters, comprising, a toothed escapement wheel subjected to a (a'mstant tortion naivement by the power driven carriage, an oscillatable ti-Lime having pivoted arms, two de tents carried by the frame and positio ed on either side ot the escapeinent wheel to cooperate therewith, a transverse member connected to the pivoted arms, rotation oil the escapement wheel oscillating the trame and causing the successive engagement: 01 one detent and disengagement ot the other detent from the escapen'ient wheel, a linger on the transverse member, a release member normally engaging with the h get, therelease member eomprisin a pivoted lever one end of which is positionet to contact with the linger, a toothed cam whorl, means urging the other end of the lever into contact with the cam wheel, a linger normally engaging the teeth of the toothed wheel, a bar translatorily movable by the keys or spacer bar, a rod carrying the linger and pivoted to the bar, cam cooperating with the rod to rock the rod on the bar during translation of the bar so as to disengage the linger from the toothed cam wheel, the disengagement of the linger from the toothed cam wheel taking place after the cam wheel has been rotated an amount corresponding to at least one alternate pivoting movement oi? the pivoted lever.

T. An escapementmechanism tor typewriters, con'iprising, a toothed escapement wheel subjected to a constant tortion movement by the power driven carriage, an oscillatable frame having pivoted arms, two detents carried by the frame and positioned on either side of the escapement wheel to cooperate therewith, a transverse member connected to the pivoted arms, rotation of the escapement wheel oscillating the frame and causing the successive engagement of one detent and disengagement ot' the other detent from the escapement wheel, a finger on the transverse member, a release member, normally engaging with the finger, the release member comprising, a pivoted lever one end at which is positioned to contact with the linger, a toothed cam wheel, means urging the other end of the lever into contact with the cam wheel, finger normally engaging the teeth ot the toothed wheel, a bar translatorily movable by the keys or spacer bar, a

rod carrying the finger and pivoted to the bar, a cam cooperating with the rod to rock the rod on the bar during translation of the bar so as to disengage the finger from the toothed cam wheel, the cam being in the term of an eccentric, hand controlled me: to adjust the position of the can'i, the d engagement of the linger from the toothed wheel following a predetermined an ular movement of the toothed wheel according to the adjustment oi the cam, whereby to cause a predeti-n'mined number of sncces.-'ve alternat'e pivoting movements ot the pivoted lever controlling the frame.

8. lfiscapement mechanism in which an escapement wheel has a control means engaging with the wheel and a release means normally holding the control means in fixed position, the control means being disen aged from the wheel by the power drive of the carriage as soon as the control means is released by the release means, the control means comprising an oscillating frame having arms connected by a transverse mei'nber, a linger on the transverse member and controlled by said release means, two detcnts carried by the t'rame on either side of the 'apemcnt' wheel, and auxiliary means to disengage the detents from and maintain them out oi? contact with, the escapeinent wheel, to permit motion of the carriage under the action of the drive of the carriage.

E). Escapement mechanisn'i in which an escapement wheel has a control means engaging with thew ieel and a release means normally holding the control means in fixed position, the control means being disengaged from the wheel. by the power drive of the carriage as soon the control means is released by the release means, the control. means comprising an oscillating frame having arms connected by a transverse member, a finger on the transverse member and controlled by said release means, two detents carried by the frame on either side of the escapement wheel, an arm pivoted to each detent, a pivoted rod cooperating with the arms on the detents, operating means for moving the pivoted rod to thereby cause it to act on the detent arms to withdraw one of the detents from engagement with the escapement wheel, and to restrain tl e other detent "from motion, and resilient means for returning the detents and pivoted rod to normal. position upon release of said operating means.

In testimony whereof I aiiix my signature.

HENRY PEETERS. 

